I'll go take some more detailed pics of it in a minute, but yeah, that's pretty much it. Tom's right, the butterfly's really have nothing to do with air flow except at WOT. When I cruise around at say 2500-300 rpm, they're barely open, but open fully at WOT. Took a bit of time to get it, but after I figure out I needed to get the carbs idle screws dialed in before I even messed with that, was a snap. Just set it with a tiny bit of slack with the throttle closed (Normal position).
Ray